If you're using Vagrant and you've upgraded
to the latest version of VirtualBox
(4.3.10 as of March 25, 2014), and you've got
vagrant-vbguest
installed (as you should) then you've undoubtedly run into a nasty bug:

That does work. However, I wanted to make this a little more automated,
as at the moment I'm creating Virtual Machines as examples, and I want
it to be as seamless as possible. I made my Vagrantfile look like this: